Many Americans may be dissatisfied with Congress, but three of the Houston-area’s nine House members won’t face a challenger in next year’s elections. And three others face little-known primary opponents who are new to the political stage.

Veteran Reps. Al Green, D-Houston, Gene Green, D-Houston, and Ted Poe, R-Humble, won challenger-free returns to Capitol Hill in 2012 with the end of candidate filing in Austin on Monday.